Indian Institute of Foreign Trade 2010 Solved Paper

The percentage change in number of subscribers in March 10 as compared to Dec 09 in U.P. (E) $=\frac{45.53-39.68}{39.68}=14.74$ percent
The percentage change in number of subscribers in March 10 as compared to Dec 09 in Bihar $=\frac{38.36-33.17}{33.17}=15.64$ percent
The percentage change in number of subscribers in March 10 as compared to Dec 09 in Orissa $=\frac{15.89-13.57}{13.57}=17.09$ percent
The percentage change in number of subscribers in March 10 as compared to Dec 09 in Haryana $=\frac{14.96-13.59}{13.59}=10.08$ percent
We can see that Orissa observed maximum rate of change from Dec 2009 to March 2010.
Hence, option C is the correct answer.